Kerala Chief Minister Pinarayi Vijayan and his ministers marched to the office of the Reserve Bank of India (RBI) in Thiruvananthapuram on Friday and sat on protest against the ban on Rs. 500 and Rs. 1,000 notes announced by Prime Minister Narendra Modi on November 8. The ruling Left-led coalition has demanded help for cooperative banks, which they say have been forced to shut operations in Kerala as part of the government's demonetisation drive.